Cognitive Dissonance
Theoretically, we are all ignorant
To be mass produced for human consumption, the fact that we see no issue when grinding animals within a tenth of a second where it is quickly packaged for our consumption, is very disturbing. I'm not a vegan, but its very unsettling to know billions of animals are being massacred every second to be eaten.
Its a literal horror film, and we're the deranged murderers.
Its a literal horror film, and we're the deranged murderers.

" but the reality is that we evolved past being a hunter-gatherer society long, long ago and this is the price the world pays for allowing us to hit the top of the food chain. 
well then maybe they should have evolved more